Martin Marietta Materials: which funds bought and sold

Institutions that bought and sold Martin Marietta Materials shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 459 institutions that filed 13F reports for both quarters added to or opened positions in Martin Marietta Materials, and 490 cut or closed them. Together they added a net 179K shares, +0.3% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 396K shares (+2.3%); index fund managers were net buyers of 367K shares (+2.1%). 100 opened a new position and 98 sold out entirely.

Bought, Q2 2026 459 institutions, 100 of them new holders Sold, Q2 2026 490 institutions, 98 of them sold out

Net change, all compared +179K shares (+0.3%)

Net change, active managers +396K shares (+2.3%), 37 bought, 39 sold

Buyers versus sellers

institutions compared, 1,155

459 bought 206 490 sold

Active managers and hedge funds 37 bought · 39 sold · +396K

Index fund managers 9 bought · 3 sold · +367K

Other institutions 413 bought · 448 sold · −584K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
TCI Fund Management Ltd Hedge fund	+1.3M New position	1.3M	$758M
State Street Corp Index funds	+282K +9.8%	3.2M	$1.8B
Goldman Sachs Group Inc	+277K +31.3%	1.2M	$671M
59 North Capital Management, LP Hedge fund	+214K New position	214K	$123M
Victory Capital Management Inc Active manager	+146K +8.9%	1.8M	$1B
Freestone Grove Partners LP Hedge fund	+124K New position	124K	$71.7M
Junto Capital Management LP Hedge fund	+124K New position	124K	$71.2M
Price T Rowe Associates Inc Active manager	+110K +7.4%	1.6M	$922M
Hawk Ridge Capital Management LP Hedge fund	+78K +48.7%	239K	$138M
Rdst Capital LLC	+68K +72.0%	164K	$94.3M
Bornite Capital Management LP	+65K New position	65K	$37.6M
Bank Of America Corp	+47K +2.0%	2.4M	$1.4B
UBS Am, A Distinct Business Unit Of UBS Asset Management Americas LLC	+46K +13.6%	386K	$223M
Pictet Asset Management Holding SA	+45K +120.3%	82K	$47.4M
Dimensional Fund Advisors LP	+40K +7.3%	586K	$338M
Millennium Management LLC Hedge fund	+39K +264.2%	54K	$31.2M
Mirae Asset Global Etfs Holdings Ltd.	+38K +8.5%	486K	$280M
Vanguard Portfolio Management LLC Index funds	+37K +1.2%	3.2M	$1.8B
UBS Group AG	+36K +10.2%	390K	$225M
Eventide Asset Management, LLC	+34K +1185.6%	37K	$21.6M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
TCI Fund Management Ltd Hedge fund	+1.3M New position	1.3M	$758M
59 North Capital Management, LP Hedge fund	+214K New position	214K	$123M
Victory Capital Management Inc Active manager	+146K +8.9%	1.8M	$1B
Freestone Grove Partners LP Hedge fund	+124K New position	124K	$71.7M
Junto Capital Management LP Hedge fund	+124K New position	124K	$71.2M
Price T Rowe Associates Inc Active manager	+110K +7.4%	1.6M	$922M
Hawk Ridge Capital Management LP Hedge fund	+78K +48.7%	239K	$138M
Millennium Management LLC Hedge fund	+39K +264.2%	54K	$31.2M
Renaissance Technologies LLC Hedge fund	+32K New position	32K	$18.4M
Cinctive Capital Management LP Hedge fund	+30K New position	30K	$17.3M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
FMR LLC Active manager	−415K −15.9%	2.2M	$1.3B
Jpmorgan Chase & Co	−393K −21.1%	1.5M	$853M
Morgan Stanley	−330K −24.6%	1.0M	$584M
T. Rowe Price Investment Management, Inc. Active manager	−311K −32.7%	641K	$370M
Congress Asset Management Co Active manager	−177K −74.4%	61K	$35.1M
Rathbones Group PLC	−166K −50.8%	160K	$92.5M
Aristotle Capital Management, LLC Active manager	−124K −6.3%	1.8M	$1.1B
Alkeon Capital Management LLC Hedge fund	−120K −16.1%	627K	$362M
Baillie Gifford & Co Active manager	−96K −8.8%	992K	$572M
William Blair Investment Management, LLC Active manager	−90K −33.2%	182K	$105M
CIBC Bancorp Usa Inc.	−84K −17.7%	391K	$226M
Diamond Hill Capital Management, LLC (Investment Advisor) Active manager	−75K −26.0%	214K	$123M
Interval Partners, LP Hedge fund	−70K −74.9%	24K	$13.7M
Franklin Resources Inc Active manager	−69K −13.0%	459K	$265M
Woodline Partners LP Hedge fund	−58K −81.5%	13K	$7.6M
Natixis Advisors, LLC	−51K −50.4%	50K	$29M
Jones Financial Companies LLLP	−50K −59.4%	34K	$21.1M
TCW Group Inc Active manager	−46K −95.8%	1,982	$1.1M
Arrowstreet Capital, Limited Partnership Hedge fund	−45K −48.9%	47K	$27M
Barclays PLC	−44K −30.3%	102K	$58.7M

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
FMR LLC Active manager	−415K −15.9%	2.2M	$1.3B
T. Rowe Price Investment Management, Inc. Active manager	−311K −32.7%	641K	$370M
Congress Asset Management Co Active manager	−177K −74.4%	61K	$35.1M
Aristotle Capital Management, LLC Active manager	−124K −6.3%	1.8M	$1.1B
Alkeon Capital Management LLC Hedge fund	−120K −16.1%	627K	$362M
Baillie Gifford & Co Active manager	−96K −8.8%	992K	$572M
William Blair Investment Management, LLC Active manager	−90K −33.2%	182K	$105M
Diamond Hill Capital Management, LLC (Investment Advisor) Active manager	−75K −26.0%	214K	$123M
Interval Partners, LP Hedge fund	−70K −74.9%	24K	$13.7M
Franklin Resources Inc Active manager	−69K −13.0%	459K	$265M

New positions

largest by value

Institution	Shares	Value June 30, 2026
TCI Fund Management LtdHedge fund	1.3M	$758M
59 North Capital Management, LPHedge fund	214K	$123M
Freestone Grove Partners LPHedge fund	124K	$71.7M
Junto Capital Management LPHedge fund	124K	$71.2M
Bornite Capital Management LP	65K	$37.6M
Renaissance Technologies LLCHedge fund	32K	$18.4M
Cinctive Capital Management LPHedge fund	30K	$17.3M
Fourth Sail Capital LP	27K	$15.6M
Montanova Capital, LLCHedge fund	26K	$15M
Adage Capital Partners Gp, L.L.C.Hedge fund	19K	$10.7M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Jennison Associates LLCActive manager	32K	$19M
Coalescence Partners Investment Management, LP	31K	$18.1M
Drummond Knight Asset Management Pty Ltd	26K	$15.4M
Saraza Management, LP	11K	$6.4M
Verition Fund Management LLCHedge fund	8,733	$5.1M
Cercano Management LLC	8,407	$4.9M
Man Group PLCHedge fund	7,082	$4.2M
Banque Pictet & Cie SA	5,898	$3.5M
Sma Capital LLC	5,126	$3M
Regents Gate Capital LLP	5,054	$3M

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 1,068
Ten largest holders: 45.5%
Index fund managers: 30.6%
Active managers and hedge funds: 29.5%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	37	39	13	6	+396K	+2.3%
Index fund managers	9	3	0	0	+367K	+2.1%
Other institutions	413	448	87	92	−584K	−2.5%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Martin Marietta Materials.

Only managers that filed a holdings report for both quarters are compared (1,155 here). 28 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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